1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
arsen [322]
3 years ago
13

The evolution of eukaryotic cells most likely involved _____.

Biology
1 answer:
Sergeeva-Olga [200]3 years ago
7 0
Absorbing prokaryotic cells. This theory is called the endosymbiotic theory.
The early prokaryotic cells that were absorbed likely evolved into mitochondria and chloroplasts, membrane-bound organelles with their own DNA in single chromosomes and their own ribosomes.
You might be interested in
Eye pigment in a particular strain of fly is determined by two genes. An autosomal gene that controls the color of the pigments
Semenov [28]

RrXtXt×RrXTY is representing the cross between the white eyed female and red eyed male.

Option D

<h3><u>Explanation:</u></h3>

The genes that are discussed here both are completely dominant over their recessive alleles. In the autosome, the dominant R gene is responsible for red eye and recessive r gene is responsible for sepia eye. But in allosome, the dominant T gene allows the eye colour to be expressed and the recessive t gene doesn't allow eye colour to be expressed and makes it white.

As the female do have 2 X chromosomes and the female is white eyed, then both the chromosomes of female have t gene.

As the male is red eyed and have one X chromosome, so the male must have atleast one R gene in autosome to make the eye colour red and must have T gene in his X chromosome to make it appear in phenotype.

So the most possible cross that is given here is RrXtXt×RrXTY.

6 0
3 years ago
What is the probability that an offspring will have SsRr genotype from a cross of SsRr individuals
lara [203]

Answer:

6.26%

Explanation:

4 0
3 years ago
1. What causes the autorhythmicity or action potentials of the nodal cells? a. A decrease in chloride permeability b. A gradual
Sveta_85 [38]

Answer:

The correct answer will be option-C

Explanation:

The rhythm of the heartbeat is controlled by the pacemaker of the heart called the sino-atrial node.

The SA node generates action potentials which trigger the contraction and relaxation of the atrium and ventricles. The membrane potential generation initiates by the depolarization of the cell membrane when the L type of Ca⁺² ions opens up and calcium ions enter the cell.

This depolarizes the cell until the potential threshold is reached which lies between the -40 and -30 mV.

Thus, Option-C is the correct answer.

5 0
3 years ago
Which of the following observations did Mendel make as a result of his experiments with dihybrid crosses?
Vinvika [58]

The correct answer is: B) Different traits are inherited separately.

Mendel’s conclusions as a result of his experiments with dihybrid crosses are known as Mendel’s laws.

• Mendel’s law of Segregation: During the gametes formation (meiosis), alleles are separated so that each gamete carries only one allele for each gene

• Mendel’s law of Independent Assortment: The segregation of alleles of one gene is independent to that of any other gene

Mendel also defined the Principle of Dominance: Recessive alleles will be masked by dominant alleles when are together in heterozygous genotype.

3 0
3 years ago
For each sequence of DNA is shown. Write the complementary RNA sequence underneath the letters, thenuse the codon chart to deter
Dmitriy789 [7]

Answer:

DNA → ​​TACCATGGAATTACT

RNA → AUGGUACCUUAAUGA

PROTEIN → Methionine-Valine-Proline-Stop codon-Stop codon (AUG GUA CCU UAA UGA)

Explanation:

In nucleic acids (i.e., DNA and RNA), base complementarity refers to the interaction between antiparallel strands. In the double helix DNA molecule, adenine always interacts with thymine (uracil in RNA), while cytosine always interacts with guanine. Moreover, amino acids are encoded by codons, i.e., triplets of nucleotides in the messenger RNA (mRNA). Finally, stop codons are triplets of mRNA nucleotides (e.g., UAG, UAA, UGA) that indicates the end of the protein-coding sequence.

8 0
2 years ago
Other questions:
  • In DNA adenine levels were equal to thymine levels and cytosine levels were equal to guanine levels.
    14·1 answer
  • Scientists discovered that The Cumberland Bone Cave in Maryland holds bones from hundreds of animals from different climates and
    9·1 answer
  • To reiterate instructions A. mediae on B. confuse C. explain D. repeat E. revise
    7·2 answers
  • A client with type 1 diabetesis admitted to an acute care facility withdiabetic ketoacidosis. To correct this acute diabetic eme
    12·1 answer
  • The two forms of a gene are known as what?
    15·1 answer
  • A group of students are reviewing the anatomy and physiology of the breasts. The students demonstrate understanding of breast st
    14·1 answer
  • When you look at the night sky, sometimes there is a full moon and sometimes the moon looks like it’s barely there. Why does thi
    11·1 answer
  • 4) If an object of 40 kg is moving east at 20 m/s and collides with a 20 kg object moving along the same vector at 10 m/s, what
    7·2 answers
  • Tom is a scientist who is observing the rise of sea level every year. How much of a rise in sea level would Tom observe in any o
    5·1 answer
  • Compare the process of excretion in terrestrial arthropods with that in aquatic arthropods.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!